Repeating action for grand pianos.



PATENTED MAR 21, 1905! A. NICKEL. REPEATING AGTION FOR GRAND PIANUS.

APPLICATION FILED 13150.20, 1904.

7 jfizj a shoulder b of support I).

link 9 are influenced by a spring 'ji depending UNITED STATES PATENT @Fl lfiil.

- ADAM NICKEL, OF NEl V YORK, N. Y.

REPEATING ACTION FQR GRANEI PIIENOSH SPECIFICATION forming part of Letters Patent No. '7 85,181, dated March 21, 1905. Application no tweets 2Q, moi. Serial N0. 237,850.

To 117/ 1117mm it may; concern."

Be it known that I, ADAM NICKEL, a citizen of the United States, residing at New York city, Manhattan, county and State of New York, have invented new and useful linproveinents in Repeating Actions for Grand Pianoaof which the following is a s eeifiea tion.

This invention relates to a repeating antic for grand pianos which'is sensitively responsive to the touch and prevents lingering of the hammer at the string.

in the accompanying drawings, Figure 1 is a side elevation, partly in section, of my improved piano-action, showing the normal position of the parts; and Figs. 2 and 3 are siinilar views of part of the action, showing consecutive positions of the jack before and after the hammer has struck the string.

The letter (1, represents the key of a grandpiano action. is the support, fulcruined at b, and c the lever, pivoted to the support a c. The hammer d, resting with its shanl upon the knuckle c of the lever c, is pivoted at d to the flan e e of the hammer-rail c. The ackf is ma e in the form of an elbowlever and is pivoted at its lower bend or elbow to the forward end of the support 5, as

at f. The lower or substantially horizontal arm of the ack PIOJBCtS forward from sup port I) and has a beveled upper surfaceuvhich is adapted to be operatively engaged by an escapement-button e The upright arm of the jack is slotted at its upper end for the reception of the lower end of link g, which is pivoted thereto at g. g is received by the slotted forwerd. end of le- 'vcr c, to which it is pivoted From the front ofthe jack projects upwardly a nose it, which is adapted to engage the forward end of lever c and the rear cushioned side e of: rail 6, such nose serving to limit the play of the jack. In order to adjust such play, a regulatin -button e, projecting from the back of the jack, is adapted to contact with The jackf and from lever c and connected to link g by thread g if the key is in its normal position, the yackj and link 9 form a rent'rant obtuse an- The upper end of link gle, l. Upon a depression of the key the support 1) is swung upward on pivot i), so that the hammer is thrown against the string. Shortly before the string has been struck the lower arm of jackj" ill be engaged by the button e Fig. 2, which will throw the upper end of the jack 7" and the lower end of the link g forward to form. a salient obtuse angle, Fig. 3, which is smaller than the reentrant angle forn'ierly formed. In this way the combined length of the parts f g is reduced, so that the lever 0 will descend at its forward end and the hammer will reeede from the string. Upon the partial or full'release of the key l-ll( spring, j will return all the parts to their normal po sition, Fig. l.

The nose 72. has the following function: Upon a powerful stroke of the key the felt of button "2 being near the fulcrum f, is compressed-and thus the center g tends to move backward unduly. This'is prevented by the nose 7t striking the front of lever 0. After a powerful stroke of the he y the contact of the nose h with the hammer-rail e prevents the upper end of the jack from flying forward to an excessive extent, so that the spring j can readily draw the jack back into its normal position.

will be observed that the construction of the escapeinent is such that the button wil first ene'age the lower arm of the jack near its free end, Fig. 2, to start the aek and will then engage such arm nearer to its fulcrum, Fig. 3, to throw the jack forward with increased rapidity. The result is that a very sei'isitivc escapemont is obtained and lingerthe hammer at the string is prevented.

W iat I claim isi. A; repeating action for grand pianos, provided with a support, an elbow shaped iack pivoted thereto at its bend, and having beveled lower arm, an escapement-hutton adapted'to operatively engage said arm, av

arnmer-supporting lever, and a pivoted link which connects the jack to the lever, substantially as specified.

2. A repeating action for grand pianos, provided with a support, an elbow-shaped jack pivoted thereto at its bend, an escape-- merit-button adapted to operatively engage tbs lower 'aabarm a hzlmmep'iail a haml mm) New York .ishis 17th dam of Decemba- :5 5 V 7 i J mar-supporting levey, a pivoted lmk Whmh 1904. 11-0 a N f e". 1 anose (01 16 g ah ack 0 phage l a 1C1 L ADAM NLCKBJL pro ectmg upwamiyfrom mm ja0k&11.&d3,PL'-. 5 oil-i0 engage the hammer-Emianal the lever Wxtnesses:

sxflosmntialiy as speclfied. PHILIP MENGES,

glgned byg ge, atflew 02k any, (Manna? CHAS. ML'UHLENFELS. 

